As to one tribe name not being like others. The tribes correspond to periods of Greek history according to Hesoid:
Gold Age
Silver Age
Bronze Age
Heroic Age
Iron Age
Also Age is supposed to be the original myth of Herakles, who was for the most part a wild brute. The 12 labors are another play on this, also the Princess has the name of one of Herakles' wives (the one that didn't poison him).
To be honest I found the Princess to be the most unlikable character. There's just something about such a sheltered character having so much unbridled optimism.
As for Age, he's Goku-lite.